20991938

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{829}}^1\times {\mathrm{1151}}^1$

素因数の和:1993

約数の個数: 16

約数和(自身を含む): 34421760

約数和(自身を除く): 13429822

約数列:

[1, 2, 11, 22, 829, 1151, 1658, 2302, 9119, 12661, 18238, 25322, 954179, 1908358, 10495969, 20991938]

約数ペア:

[(1, 20991938), (2, 10495969), (11, 1908358), (22, 954179), (829, 25322), (1151, 18238), (1658, 12661), (2302, 9119)]